______many times, he still doesn’t know how to use the computer.

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问题 ______many times, he still doesn’t know how to use the computer.

选项 A、He has been told
B、We have told him
C、Having been told
D、Having told him

答案C

解析 如果选[A]、[B],那么前后两个句子之间则缺乏连词。如果选[D],其逻辑主语则为句子主语,不符合题意。 [C]的逻辑主语为he,符合非谓语动(短语)在句中作状语时,其逻辑主语为句子主语的语法。
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